Code 23 questions

[Phishown]

once fixed, you will be shocked how nice it runs.... exiting LIMP mode. (jeep calls this Limp-in)btw
one guy hear called it grenade mode, I still laugh when i think of that phrase..

Ok so I changed out the ECU back to the one that was on it before the engine swap. No more code 23. However, I'm getting a code 53. Before I trace down all the grounds could this be the wrong ECU for the 93' Siedkick? This ECU is 33920-58B30.

Thanks for all the help.

Mark